Rail
Select the rail size, condition, length, and quantity.
ⓘ Identification & Terminology GuideUse rolled markings and cross-section measurements together. Rail weight alone may not uniquely identify the section.
Open Guide
Use rolled markings and cross-section measurements together. Rail weight alone may not uniquely identify the section.
Original MidStates identification schematic. Not to scale and not an installation or engineering drawing.
Rail Identification & Terminology
The standardized rail profile/design, usually identified by nominal lb/yd plus a section designation such as 115RE or 132RE.
The upper portion that carries the wheel load.
The vertical center portion connecting the head and base; rolled identification markings are commonly found here.
The lower portion that seats on the tie plate or fastening system.
The side of the rail facing the inside of the track gauge.
The side facing away from the track gauge.
How to identify what you have
- Look along the web for rolled or stamped rail markings and photograph every readable mark.
- Record nominal rail weight if known, but do not rely on weight alone when the exact section matters.
- Compare overall height, base width and head width to a recognized rail-section reference.
- If wear is significant, use unworn surfaces where possible and note curve wear or head loss.
What to measure
- Overall rail height
- Base width
- Head width
- Web thickness when needed
- Rail length
What photos help MidStates
- Full rail cross-section/end
- Web markings
- Head and gauge face
- Base/flange
- Tape or caliper shown with key measurements
Common identification mistakes
- Calling rail only by weight when multiple historical sections exist
- Measuring a heavily worn head without noting wear
- Using a tie-plate seat width as a substitute for confirmed rail section
Technical references & source notes
Reference for rail-section terminology and dimensional identification. MidStates diagrams are original and are not copies of the UP drawing.
Open authoritative public sourceReference index for rail sections, joint bars, compromise joints, tie plates, switches, turnout components, frogs, guard rails and fasteners.
Open authoritative public sourceMidStates uses external publications to support technical facts and terminology. The explanatory text, diagrams and presentation on this page are original MidStates content and do not reproduce railroad or AREMA drawings.
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#1 and Curve Worn cannot be selected together. Buy America Compliant can be selected with either.